Protests that led to the deaths of the U.S. Ambassador in Libya and three other Americans at the consulate in Benghazi spread across the region. NBC's Richard Engel in Egypt and NBC's Ayman Mohyeldin in Libya report on what might have triggered the attacks and the United States' history in the region.

Protests that led to the deaths of the U.S. Ambassador in Libya and three other Americans at the consulate in Benghazi spread across the region, ignited by a controversial film that ridicules Islam's Prophet Muhammad.